81351772320

Names of 81351772320

• Cardinal: 81351772320 can be written as Eighty-one billion, three hundred fifty-one million, seven hundred seventy-two thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.135177232 × 10¹⁰

Factors of 81351772320

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 957

Divisors of 81351772320

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 31 32 35 39 40 42 48 52 56 60 62 65 70 73 78 80 84 91 93 96 104 105 112 120 124 130 140 146 155 156 160 168 182 186 195 208 210 217 219 224 240 248 260 273 280 292 310 312 336 364 365 372 390 403 416 420 434 438 455 465 480 496 511 520 546 560 584 620 624 651 672 728 730 744 780 806 823 840 868 876 910 930 949 992 1022 1040 1085 1092 1095 1120 1168 1209 1240 1248 1302 1365 1456 1460 1488 1533 1560 1612 1646 1680 1736 1752 1820 1860 1898 2015 2044 2080 2170 2184 2190 2263 2336 2418 2469 2480 2555 2604 2730 2821 2847 2912 2920 2976 3066 3120 3224 3255 3292 3360 3472 3504 3640 3720 3796 4030 4088 4115 4340 4368 4380 4526 4745 4836 4938 4960 5110 5208 5460 5642 5694 5761 5840 6045 6132 6240 6448 6510 6584 6643 6789 6944 7008 7280 7440 7592 7665 8060 8176 8230 8463 8680 8736 8760 9052 9490 9672 9876 10220 10416 10699 10920 11284 11315 11388 11522 11680 12090 12264 12345 12896 13020 13168 13286 13578 14105 14235 14560 14880 15184 15330 15841 16120 16352 16460 16926 17283 17360 17520 18104 18980 19344 19752 19929 20440 20832 21398 21840 22568 22630 22776 23044 24180 24528 24690 25513 26040 26336 26572 27156 28210 28470 28805 29419 30368 30660 31682 32097 32240 32920 33215 33852 33945 34566 34720 35040 36208 37960 38688 39504 39858 40880 42315 42796 43680 45136 45260 45552 46088 47523 48360 49056 49380 51026 52080 53144 53495 54312 56420 56940 57610 58838 60079 61320 63364 64194 64480 65840 66430 67704 67890 69132 72416 74893 75920 76539 79008 79205 79716 81760 84630 85592 86415 88257 90272 90520 91104 92176 95046 96720 98760 99645 102052 104160 106288 106990 108624 112840 113880 115220 117676 120158 122640 126728 127565 128388 131680 132860 135408 135780 138264 147095 149786 151840 153078 158410 159432 160485 169260 171184 172830 176514 178591 180237 181040 184352 190092 193440 197520 199290 204104 205933 212576 213980 217248 224679 225680 227760 230440 235352 237615 240316 245280 253456 255130 256776 265720 270816 271560 276528 294190 299572 300395 306156 316820 318864 320970 331669 338520 342368 345660 353028 357182 360474 362080 374465 380184 382695 395040 398580 408208 411866 420553 427960 441285 449358 451360 455520 460880 470704 475230 480632 506912 510260 513552 531440 535773 543120 553056 588380 599144 600790 612312 617799 633640 637728 641940 663338 677040 691320 706056 714364 720948 748930 760368 765390 781027 797160 816416 823732 841106 855920 882570 892955 898716 901185 921760 941408 950460 961264 995007 1020520 1027104 1029665 1062880 1071546 1086240 1123395 1176760 1198288 1201580 1224624 1235598 1261659 1267280 1283880 1326676 1354080 1382640 1412112 1428728 1441896 1497860 1520736 1530780 1562054 1594320 1647464 1658345 1682212 1711840 1765140 1785910 1797432 1802370 1862449 1900920 1922528 1990014 2041040 2059330 2102765 2143092 2246790 2321683 2343081 2353520 2396576 2403160 2449248 2471196 2523318 2534560 2567760 2653352 2678865 2765280 2824224 2857456 2883792 2995720 3061560 3088995 3124108 3188640 3294928 3316690 3364424 3530280 3571820 3594864 3604740 3724898 3801840 3905135 3980028 4082080 4118660 4205530 4286184 4493580 4643366 4686162 4707040 4806320 4942392 4975035 5046636 5135520 5306704 5357730 5467189 5587347 5714912 5767584 5991440 6123120 6177990 6248216 6308295 6589856 6633380 6728848 6965049 7060560 7143640 7189728 7209480 7449796 7603680 7810270 7960056 8237320 8411060 8572368 8987160 9286732 9312245 9372324 9612640 9884784 9950070 10093272 10613408 10715460 10934378 11174694 11608415 11715405 11982880 12246240 12355980 12496432 12616590 13037143 13266760 13457696 13930098 14121120 14287280 14418960 14899592 15620540 15920112 16401567 16474640 16822120 17144736 17974320 18573464 18624490 18744648 19769568 19900140 20186544 21430920 21868756 22349388 23216830 23430810 24211837 24711960 24992864 25233180 26074286 26533520 27335945 27860196 27936735 28574560 28837920 29799184 31241080 31840224 32803134 32949280 33644240 34825245 35948640 37146928 37248980 37489296 39111429 39800280 40373088 42861840 43737512 44698776 46433660 46861620 48423674 49423920 50466360 52148572 53067040 54671890 55720392 55873470 59598368 62482160 65185715 65606268 67288480 69650490 72635511 74293856 74497960 74978592 78222858 79600560 82007835 85723680 87475024 89397552 92867320 93723240 96847348 98847840 100932720 104297144 109343780 111440784 111746940 121059185 124964320 130371430 131212536 139300980 145271022 148995920 156445716 159201120 164015670 169482859 174950048 178795104 185734640 187446480 193694696 195557145 201865440 208594288 218687560 222881568 223493880 242118370 260742860 262425072 278601960 290542044 297991840 312891432 328031340 338965718 363177555 371469280 374892960 387389392 391114290 417188576 437375120 446987760 484236740 508448577 521485720 524850144 557203920 581084088 625782864 656062680 677931436 726355110 774778784 782228580 847414295 874750240 893975520 968473480 1016897154 1042971440 1114407840 1162168176 1251565728 1312125360 1355862872 1452710220 1564457160 1694828590 1936946960 2033794308 2085942880 2324336352 2542242885 2624250720 2711725744 2905420440 3128914320 3389657180 3873893920 4067588616 5084485770 5423451488 5810840880 6257828640 6779314360 8135177232 10168971540 11621681760 13558628720 16270354464 20337943080 27117257440 40675886160 81351772320
• Sum of all divisors σ(n): 330429431808
• Sum of proper divisors (its aliquot sum) s(n): 249077659488
• 81351772320 is an abundant number, because the sum of its proper divisors (249077659488) is greater than itself. Its abundance is 167725887168

Bases of 81351772320

• Binary: 1001011110000111100011000100010100000₂
• Hexadecimal: 0x12F0F188A0
• Base-36: 11DEQT9C

Squares and roots of 81351772320

• 81351772320 squared (81351772320²) is 6618110859605118182400
• 81351772320 cubed (81351772320³) is 538395047839115059481297031168000
• The square root of 81351772320 is 285222.3208656713
• The cube root of 81351772320 is 4333.0031652717

Scales and comparisons

• 81,351,772,320 seconds is equal to 2,586 years, 38 weeks, 1 day, 10 hours, 32 minutes.
• To count from 1 to 81,351,772,320 would take you about five thousand, one hundred seventy-three years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81351772320 cubic inches would be around 361.1 feet tall.

Recreational maths with 81351772320

• 81351772320 backwards is 02327715318
• 81351772320 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81351772320's digits is 39
• More coming soon!